Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 31
... bright line in the air : and even if it be stifled , or let out through an opposite crevice , the light scattered through the apartment from this source is sufficient to prevent entire darkness in the room . The luminous lines ...
... bright line in the air : and even if it be stifled , or let out through an opposite crevice , the light scattered through the apartment from this source is sufficient to prevent entire darkness in the room . The luminous lines ...
Сторінка 35
... bright , to be nearer to him than the smaller and less brilliant ; but , independent of other means of judging , he would have no warrant for this opinion , any more than for the idea that all were equidistant from him , and really ...
... bright , to be nearer to him than the smaller and less brilliant ; but , independent of other means of judging , he would have no warrant for this opinion , any more than for the idea that all were equidistant from him , and really ...
Сторінка 36
... bright , may owe that apparent equality to its greater proximity , and may be really much less ; while both the moon and sun may only appear larger and brighter than the stars , on account of the remoteness of the latter . ( 50. ) A ...
... bright , may owe that apparent equality to its greater proximity , and may be really much less ; while both the moon and sun may only appear larger and brighter than the stars , on account of the remoteness of the latter . ( 50. ) A ...
Сторінка 42
... bright star , called the Pole Star , which is easily recognized by the very small circle it describes ; so small , indeed , that , without paying particular attention , and referring its position very nicely to some fixed mark , it may ...
... bright star , called the Pole Star , which is easily recognized by the very small circle it describes ; so small , indeed , that , without paying particular attention , and referring its position very nicely to some fixed mark , it may ...
Сторінка 44
... bright stars as pass the zenith may even be discerned by the naked eye ; and we have ourselves heard it stated by a celebrated optician , that the earliest circumstance which drew his attention to astronomy was the regular appearance ...
... bright stars as pass the zenith may even be discerned by the naked eye ; and we have ourselves heard it stated by a celebrated optician , that the earliest circumstance which drew his attention to astronomy was the regular appearance ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
angle angular appear apsides ascertained astronomical axis bright calculation celestial centre circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe heavens heliocentric horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations planet planetary pole portion position Post 8vo precession proper motions proportion recede recess reckoned refraction respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith
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Сторінка 674 - A Dictionary of Science, Literature, and Art : Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge ; with the Derivation and Definition of all the Terms in General Use. Edited by WT BRANDE, FRSL and E.